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authorChristoph Hellwig <hch@lst.de>2010-06-04 11:29:56 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-09 16:47:31 -0400
commitf4e420dc423148fba637af1ab618fa8896dfb2d6 (patch)
treedf0e81f5f4b8448dd6b3929e5537dcc46e7d7dde /fs/nilfs2
parent282dc178849882289d30e58b54be6b2799b351aa (diff)
clean up write_begin usage for directories in pagecache
For filesystem that implement directories in pagecache we call block_write_begin with an already allocated page for this code, while the normal regular file write path uses the default block_write_begin behaviour. Get rid of the __foofs_write_begin helper and opencode the normal write_begin call in foofs_write_begin, while adding a new foofs_prepare_chunk helper for the directory code. The added benefit is that foofs_prepare_chunk has a much saner calling convention. Note that the interruptible flag passed into block_write_begin is always ignored if we already pass in a page (see next patch for details), and we never were doing truncations of exessive blocks for this case either so we can switch directly to block_write_begin_newtrunc. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/dir.c26
1 files changed, 7 insertions, 19 deletions
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 85c89dfc71f..fc2bcfa599a 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -80,23 +80,11 @@ static unsigned nilfs_last_byte(struct inode *inode, unsigned long page_nr)
return last_byte;
}
-static int nilfs_prepare_chunk_uninterruptible(struct page *page,
- struct address_space *mapping,
- unsigned from, unsigned to)
+static int nilfs_prepare_chunk(struct page *page, unsigned from, unsigned to)
{
loff_t pos = page_offset(page) + from;
- return block_write_begin(NULL, mapping, pos, to - from,
- AOP_FLAG_UNINTERRUPTIBLE, &page,
- NULL, nilfs_get_block);
-}
-
-static int nilfs_prepare_chunk(struct page *page,
- struct address_space *mapping,
- unsigned from, unsigned to)
-{
- loff_t pos = page_offset(page) + from;
- return block_write_begin(NULL, mapping, pos, to - from, 0, &page,
- NULL, nilfs_get_block);
+ return block_write_begin_newtrunc(NULL, page->mapping, pos, to - from,
+ 0, &page, NULL, nilfs_get_block);
}
static void nilfs_commit_chunk(struct page *page,
@@ -449,7 +437,7 @@ void nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,
int err;
lock_page(page);
- err = nilfs_prepare_chunk_uninterruptible(page, mapping, from, to);
+ err = nilfs_prepare_chunk(page, from, to);
BUG_ON(err);
de->inode = cpu_to_le64(inode->i_ino);
nilfs_set_de_type(de, inode);
@@ -530,7 +518,7 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
got_it:
from = (char *)de - (char *)page_address(page);
to = from + rec_len;
- err = nilfs_prepare_chunk(page, page->mapping, from, to);
+ err = nilfs_prepare_chunk(page, from, to);
if (err)
goto out_unlock;
if (de->inode) {
@@ -587,7 +575,7 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
if (pde)
from = (char *)pde - (char *)page_address(page);
lock_page(page);
- err = nilfs_prepare_chunk(page, mapping, from, to);
+ err = nilfs_prepare_chunk(page, from, to);
BUG_ON(err);
if (pde)
pde->rec_len = cpu_to_le16(to - from);
@@ -615,7 +603,7 @@ int nilfs_make_empty(struct inode *inode, struct inode *parent)
if (!page)
return -ENOMEM;
- err = nilfs_prepare_chunk(page, mapping, 0, chunk_size);
+ err = nilfs_prepare_chunk(page, 0, chunk_size);
if (unlikely(err)) {
unlock_page(page);
goto fail;